King County Image/Raster base tiling index - idxp7500

Metadata also available as - [Questions & Answers] - [XML]

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: King County
Publication_Date: 200307

Title: King County Image/Raster base tiling index - idxp7500

Edition: One

Geospatial_Data_Presentation_Form: Vector Digital Data
Publication_Information:
Publication_Place: King County, WA
Publisher: King County
Other_Citation_Details: None

Online_Linkage: None
Description:
Abstract:
A spatial tiling index designed for storage of file-based image and other raster (i.e., LiDAR elevation, landcover) data sets. A regular grid with origin at 0,0 of the Washington North State Plane Coordinate System, with grid cells defined by orthogonal bounds 7500 feet long in easting and in northing. Only those cells currently involved in one of several image/raster data projects for King County and southwestern Snohomish County are labelled, though the labeling scheme can be extended.

The name of the spatial index is derived from the acronym (I)n(D)e(X) (P)olygons at the (7500) foot tile level, or idxp7500.

Cell label is a row-id cocantenated with a column-id generating a four-character identifier that uniquely identifies every cell. The row portion of the identifier is a two-character alpha code of the format aa, ab, ac.... ba, bb, etc. and the column portion is a two-digit integer value such as 01, 02, 03.... 11,12,13, etc. A composite cell identifier would be then, for example, aa01, aa02, .....ba11,ba12, etc.

Not all image and raster data is stored at the tiling level represented by this index. Data is stored at this level if full-resolution, uncompressed data would generate larger than manageable file sizes at a larger tile size.

Purpose:
This index is primarily a data processing, data storage level index which allows all raster and image data stored at this level to be maintained in a common, consistent tile and naming scheme. The index also serves as a useful central reference scheme for identification of real-world locations.

This index level is useful for users of LiDAR-derived elevation data stored as TINS because TIN format data, as well as ASCII format data, are stored only at this tiling level. Imagery in native uncompressed format will also be stored only at this level.

As each cell is defined with orthogonal edges relative the Washington State Plane coordinate system, it accomodates most common pixel resolutions of multiple ground sample distance (gsd) without partial pixel effects and without zero or NULL data 'splinters'.

Supplemental_Information:
This spatial index is one of three index or tiling levels used to store King County image and raster data. Each higher index level is designed to build upon the lower levels, with the same data often stored at more than one level (though at different resolutions) to meet a range of business and software requirements.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 200301
Ending_Date: 200307

Currentness_Reference: Publication date

Status:
Progress: Complete

Maintenance_and_Update_Frequency: None

Spatial_Domain:
Description_of_Geographic_Extent: The PSLC project area in combination with the King County ESA/SAO Project area comprise the entirety of King County and southwestern Snohomish County (WRIA 8). The PSLC portion encompasses approximately 500 square miles, including Vashon Island, the Seattle urban environs, and mid-central King County. The ESA/SAO portion, approximately 1800 square miles,includes the remainder of King County and the Snohomish portion.

Bounding_Coordinates

Keywords:
Theme:
Theme_Keyword_Thesaurus: Not applicable
Theme_Keyword: Image data

Theme_Keyword: Raster data

Theme_Keyword: Spatial index
Theme_Keyword: Tiling Index

Place:
Place_Keyword_Thesaurus: Not applicable
Place_Keyword: King County, WA
Place_Keyword: Pacific NW
Place_Keyword: Washington state
Place_Keyword: Seattle
Place_Keyword: Snohomish County, southwestern portion

Access_Constraints: None
Use_Constraints: None

Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Michael Leathers

Contact_Organization:
King County Geographic Information Center, Department of Natural Resources and Parks
Contact_Position: GIS Data Coordinator
Contact_Address:
Address_Type: Mailing and physical address
Address: 201 S Jackson St, Suite 706

City: Seattle
State_or_Province: WA
Postal_Code: 98104

Country: USA
Contact_Voice_Telephone: 206-263-4867
Native_Data_Set_Environment:
ArcInfo, ArcView and any other software that can read ESRI shapefile format on Windows or Unix. Index is available only in shapefile format.

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Identifiers for each cell are sequential and unique.
Logical_Consistency_Report: All cells have a label attribute
Completeness_Report:
The index currently covers the King County and southwestern Snohomish County areas currently involved in several related image/raster data acquisition projects. The extent has been buffered to encompass some adjoining areas.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The bounds of each cell were generated from State Plane easting and northing coordinate values defined from the 0,0 origin and at even 7500 increments.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: King County

Publication_Date: 2003
Title: King County ESA/SAO Data Acquisition project
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: King County, WA
Publisher: King County
Other_Citation_Details:
This index was developed jointly between the King County Dept of Transportation Roads Maintenance Dept and the King County GIS Center
Type_of_Source_Media: Not Applicable
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 012003
Ending_Date: 072003
Source_Currentness_Reference: Publication date
Source_Citation_Abbreviation: ESA/SAO
Source_Contribution:
A common data storage mechanism for file-based image/raster data at highest (full) resolution.
Process_Step:
Process_Description:
ArcInfo GENERATE command with FISHNET option was used to create the polygon coverage of individual cells. The coverage was converted to a shapefile. An integer row-id and integer column-id were updated for the PAT. The values from each of these items was cocatenated to produce a unique integer identifier for each cell.
Process_Date: 012003
Process_Step:
Process_Description:
Microsoft Excel was used to create a master attribute spreadsheet with all other cell attributes tied to the unique integer id of each cell. The data from the spreadsheet was exported to text format and joined to the shapefile dbf in ArcView. The resulting updated shapefile was reexported to a final shapefile.

Process_Date: 2002
Process_Step:
Process_Description:
To accomodate generation of the Zone level tiling index, additional attributes were added to the index shapefile dbf to indicate of which zone each cell is a member.
Process_Date: 200306

Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
The grid defined by this index is a regular grid that does not have any additional or indirect spatial reference.
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Ring composed of arcs

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: Washington, North
Lambert_Conformal_Conic:
Standard_Parallel: 47.500000
Standard_Parallel: 48.733333
Longitude_of_Central_Meridian: -120.833333
Latitude_of_Projection_Origin: 47.000000
False_Easting: 1640416.666500
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and column
Coordinate_Representation:
Abscissa_Resolution: 1
Ordinate_Resolution: 1
Planar_Distance_Units: Survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983, 1991 Adjustment (HPGN)
Ellipsoid_Name: GRS 80
Semi-major_Axis: 20925604.4720406
Denominator_of_Flattening_Ratio: 298.26

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Shapefile dbf attribute file
Entity_Type_Definition: Index cell identifier and descriptive attributes
Entity_Type_Definition_Source: Software assigned and user indexed
Attribute:
Attribute_Label: tile_id
Attribute_Definition: Five-digit unique integer identifier for each cell
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain: Unique integer
Attribute:
Attribute_Label: tile_abb
Attribute_Definition:
Unique alphanumeric identifier for each cell comprised of two-character alpha code defining in which spatial column the cell exists cocantenated with a two-digit numeric code defining in which spatial row the cell exists. Alpha portion is uppercase.
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain: Alpha code
AA04, AA05, BB12, BC16, etc.
Attribute:
Attribute_Label: tile_abblc
Attribute_Definition:
Primary 'colloquial' identifier for each cell identical in value to the tile_abb, but where the alpha portion of the code is lowercase. Unique alphanumeric identifier comprised of two-character alpha code defining in which spatial column the cell exists cocantenated with a two-digit numeric code defining in which spatial row the cell exists.
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain: Unique alphanumeric code
Attribute:
Attribute_Label: col_abb
Attribute_Definition: Unique alpha identifier for each column, in uppercase.
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain:
Alpha codes beginning with AA and sequencing as AB, AC... AZ, then reinitializing as BA, BB, ... out to the current limit of the defined cells.
Attribute:
Attribute_Label: col_abblc
Attribute_Definition: Unique alpha identifier of each column in lowercase.
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain:
Alpha codes beginning with aa and sequencing as ab, ac... az, then reinitializing as ba, bb, ... out to the current limit of the defined cells.
Attribute:
Attribute_Label: col_id
Attribute_Definition: Three-digit numeric code uniquely identifying each column
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain: Sequence initiallized at 101 and sequencing as value + 1.
Attribute:
Attribute_Label: row_id
Attribute_Definition: Unique integer identifier for each row
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain:
One or two-digit integer identifier uniquely identifying each row. When cocantenated with column_abb to create tile_abb, the integer is left padded with a zero when necessary to ensure that all tile_abb always contain four characters.
Attribute:
Attribute_Label: area_sqft
Attribute_Definition:
Restating of system-generated area value to provide area value in square feet if shapefile is projected to different system.
Attribute_Definition_Source: user-defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 56250000
Range_Domain_Maximum: 56250000
Attribute:
Attribute_Label: area_sqkm
Attribute_Definition: Area of each cell in square kilometer
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 5.225
Range_Domain_Maximum: 5.225
Attribute:
Attribute_Label: area_sqmi
Attribute_Definition: Area of each cell in square miles.
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2.017
Range_Domain_Maximum: 2.017
Attribute:
Attribute_Label: perim_ft
Attribute_Definition:
Restating of system-generated area value to provide area value in square feet if shapefile is projected to different system.
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 30000
Range_Domain_Maximum: 30000
Attribute:
Attribute_Label: perim_m
Attribute_Definition: Perimiter of each cell in meters
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 9144
Range_Domain_Maximum: 9144
Attribute:
Attribute_Label: xmin
Attribute_Definition: Minimum State Plane Washington North Zone Easting
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain: Integer
Attribute:
Attribute_Label: ymin
Attribute_Definition: Minimum State Plane Washington North Zone Northing
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain: Integer
Attribute:
Attribute_Label: xmax
Attribute_Definition: Maximun State Plane Washington North Zone Easting
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain: Integer
Attribute:
Attribute_Label: ymax
Attribute_Definition: Maximun State Plane Washington North Zone Northing
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Unrepresentable_Domain: Integer
Attribute:
Attribute_Label: zonenw
Attribute_Definition:
Defines whether cell belongs to Northwest Zone polygon of idxpzone index
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: NW
Enumerated_Domain_Value_Definition: Cell belongs to Northwest Zone
Enumerated_Domain_Value_Definition_Source: User-defined
Enumerated_Domain:
Enumerated_Domain_Value: N
Enumerated_Domain_Value_Definition: Cell does not belong to Zone
Enumerated_Domain_Value_Definition_Source: User-defined
Attribute:
Attribute_Label: zonene
Attribute_Definition:
Defines whether cell belongs to Northeast Zone polygon of idxpzone index
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: NE
Enumerated_Domain_Value_Definition: Cell belongs to Northeast Zone
Enumerated_Domain_Value_Definition_Source: User-defined
Enumerated_Domain:
Enumerated_Domain_Value: N
Enumerated_Domain_Value_Definition: Cell does not belong to Zone
Enumerated_Domain_Value_Definition_Source: User-defined
Attribute:
Attribute_Label: zonene
Attribute_Definition:
Defines whether cell belongs to Southeast Zone polygon of idxpzone index
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SE
Enumerated_Domain_Value_Definition: Cell belongs to Southeast Zone
Enumerated_Domain_Value_Definition_Source: User-defined
Enumerated_Domain:
Enumerated_Domain_Value: N
Enumerated_Domain_Value_Definition: Cell does not belong to Zone
Enumerated_Domain_Value_Definition_Source: User-defined
Attribute:
Attribute_Label: zonesw
Attribute_Definition:
Defines whether cell belongs to Southwest Zone polygon of idxpzone index
Attribute_Definition_Source: User-defined
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SW
Enumerated_Domain_Value_Definition: Cell belongs to Southwest Zone
Enumerated_Domain_Value_Definition_Source: User-defined
Enumerated_Domain:
Enumerated_Domain_Value: N
Enumerated_Domain_Value_Definition: Cell does not belong to Zone
Enumerated_Domain_Value_Definition_Source: User-defined
Overview_Description:
Entity_and_Attribute_Overview:
All cells are identified with a several attributes that represent unique row, column and cell identifiers as well as other parameters. As the shapefile serves primarily as a spatial index, the tile_abb and tile_abblc are the primary attributes needed to correctly reference and describe the location of the cell tile.
Entity_and_Attribute_Detail_Citation: None

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Dennis Higgins
Contact_Organization:
King County GIS Center, Client Services, Department of Natural Resources and Parks
Contact_Position: Manager, Client Services Division

Contact_Address:
Address_Type: Mailing and physical address
Address: 201 S Jackson St, Suite 706
City: Seattle
State_or_Province: WA
Postal_Code: 98104

Country: USA
Contact_Voice_Telephone: 206-263-4523

Resource_Description: Image/Raster data base spatial index, idxp7500.shp
Distribution_Liability:
King County disclaims any warranty of use of any digital product or data beyond that for which it was designed.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcInfo Shapefile
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: \\gisdw\kclib\plibrary3\reference\indexes
Offline_Option:
Offline_Media: CD-R, DVD+R
Recording_Format: CD: Read-only, DVD: DVD+R read-only
Fees:
Contact KCGIS Client Services <http://www.metrokc.gov/gis/services/> for cost of reproduction and delivery

Metadata_Reference_Information:
Metadata_Date: 20030715

Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Michael Leathers
Contact_Organization:
King County GIS Center, Department of Natural Resources and Parks

Contact_Position: GIS Data Coordinator

Contact_Address:
Address_Type: Mailing and physical address
Address: 201 S Jackson St, Suite 706
City: Seattle
State_or_Province: WA
Postal_Code: 98104

Country: USA
Contact_Voice_Telephone: 206-263-4863

Contact_Electronic_Mail_Address: mike.leathers@metrokc.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

Generated by mp version 2.7.33 on Sat Dec 18 22:12:59 2004